以半導體光放大器為增益介質之線性共振腔多波長可調光纖雷射

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研究生：	蔡承全 Cheng-Chuan Tsai
論文名稱：	以半導體光放大器為增益介質之線性共振腔多波長可調光纖雷射 Linear-Cavity Tunable Multi-Wavelength Fiber Lasers Using an SOA as Gain Medium
指導教授：	廖顯奎 Shien-Kuei Liaw
口試委員:	徐世祥 Shih-Hsiang Hsu 王倫 Lon A. Wang 單秋成 Chow-Shing Shin
學位類別：	碩士 Master
系所名稱：	電資學院 - 電子工程系 Department of Electronic and Computer Engineering
論文出版年：	2011
畢業學年度：	99
語文別：	中文
論文頁數：	87
中文關鍵詞：	波長可調光纖雷射、極化控制器、雙通型Mach-Zehnder干涉濾波器、Sagnac迴路反射鏡、多波道光纖雷射、半導體光放大器
外文關鍵詞：	semiconductor optical amplifier, multi-channel fiber laser, wavelength-tunable fiber laser, fiber polarization controller, Sagnac loop mirror, double-pass Mach-Zehnder interferometer
相關次數：	點閱：308 下載：15
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本論文研製以半導體光放大器為增益介質之光纖雷射。我們設計三種多波長且波長可調之線性型光纖雷射，第一種架構為利用Fabry-Perot濾波器作為多波長選擇元件，實驗輸出可得到波道間距為0.4 nm之國際電信聯盟之標準規範，平坦且穩定的多波道數目可達36個波長。第二種架構為以極化保持光纖與3 dB光耦合器所組成的Sagnac迴路反射鏡作為多波長濾波元件，它具有低成本與低損耗特性，波道間距也可設定到0.4或0.8 nm，在偏壓電流480 mA下中心雷射輸出功率為-11 dBm且有23 dB的光訊雜比。第三種架構則利用全光纖式雙通型Mach-Zehnder干涉法設計的濾波元件來研製多波道雷射光源，同樣可選取0.4或0.8nm之波道間距，在增益介質偏壓電流480 mA下可提供約14 dB的有效增益，光源之訊雜比可達32 dB。上述三種架構在共振腔內皆可加入光纖極化控制器有效改變雷射共振腔之極化相關損耗，達到波長可調的效果。我們發現雙通型Mach-Zehnder干涉濾波元件式雷射架構可得到波長變動範圍達34 nm，且變動過程皆可維持鄰近波道間之功率穩定性。

This thesis proposes fiber lasers using a semiconductor optical amplifier (SOA) as the gain medium. We propose three schemes of linear-cavity multi-wavelength fiber lasers. The first structure uses a commercial Fabry-Perot filter as a multi-channel generator in the laser cavity. The experimental result indicates that the 36 wavelengths have stable output powers in 0.4 nm channel spacing nm corresponding to the ITU-T grid of 50 GHz. The second structure consists of a Sagnac loop mirror (SLM), which used as a low-loss comb filter inside the resonant cavity. Channel spacing of either 0.4 or 0.8 nm could be generated depends on the optical path length. The output peak power at central wavelength is -11 dBm and signal to noise ratio (SNR) is 23 dB, respectively. The third structure is based on an all-fiber based double-pass Mach-Zehnder interferometer (DP-MZI), which is used as comb-filter for generating the multiple channels. Channel spacing of either 0.4 or 0.8 nm could be generated. When the SOA drive current is biased at 480 mA, a small signal gain of 14 dB is obtained with an output SNR of 32 dB. Moreover, , we effectively change the polarization-dependent property of these laser cavities using a polarization controller. A wide tuning range of up to 34 nm, with stable output power, among during wavelength tuning is obtained.

摘要 .....................................................................................................................I
Abstract ..............................................................................................................II
誌謝 ..................................................................................................................III
目錄 ..................................................................................................................IV
圖表索引 ..........................................................................................................VI
符號表 ..............................................................................................................X
第一章	緒論 ......................................................................................................1
1 前言 .....................................................................................................1
2 研究動機 .............................................................................................2
3 論文架構 .............................................................................................3
第二章	多波長光纖雷射相關組件基本原理...................................................5
1 半導體光放大器原理介紹 .................................................................5
2 激發性與自發性轉換效率 .................................................................9
3	半導體光放大器增益及頻寬特性 ...................................................11
4	光纖極化控制器 ...............................................................................16
5	極化保持光纖 ...................................................................................18
6	均勻與非均勻增益介質特性的影響 ...............................................20
第三章	Fabry-Perot濾波器式多波長可調光纖雷射 ..................................22
1 光纖迴路反射鏡原理介紹 ...............................................................22
2	Fabry-Perot濾波器原理介紹 ...........................................................24
3	Fabry-Perot濾波器特性量測 ...........................................................27
4	Fabry-Perot濾波器式多波長光纖雷射架構量測 ...........................28
5	Fabry-Perot濾波器式多波長可調光纖雷射 ...................................35
6 本章小節 ...........................................................................................38
第四章	Sagnac迴路反射式多波長可調光纖雷射 .......................................39
1	Sagnac迴路反射濾波器原理介紹 ..................................................39
2	Sagnac迴路反射鏡特性量測 ..........................................................42
2.1	波道間距0.4 nm .................................................................43
2.2	波道間距0.8 nm .................................................................45
3	Sagnac迴路反射式多波長光纖雷射架構量測 ..............................47
4	Sagnac迴路反射式多波長可調光纖雷射 ......................................56
5	本章小結 ...........................................................................................59
第五章	雙通型Mach-Zehnder干涉濾波器式多波長可調光纖雷射 .........60
1	雙通型MZI干涉濾波器原理介紹 ..................................................60
2	雙通型MZI濾波器特性量測 ..........................................................63
2.1	波道間距0.4 nm .................................................................64
2.2	波道間距0.8 nm .................................................................65
3	雙通型MZI濾波器式多波長光纖雷射架構量測 ..........................66
4	雙通型MZI濾波器式多波長可調光纖雷射 ..................................75
5	本章小結 ...........................................................................................78
第六章	結論與未來展望 ................................................................................79
1 結論 ...................................................................................................79
2 未來展望 ...........................................................................................81
參考文獻 .........................................................................................................83

                                

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